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Finding the Fourth Proportional to 20,190, 30,285.27 and 6,339

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Solution

The fourth proportional to 20,190, 30,285.27 and 6,339 is: 9,508.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190 : 30,285.27 = 6,339 : x
  2. Step 2: Convert to fraction form
    20,190/30,285.27 = 6,339/x
  3. Step 3: Cross multiply
    20,190x = 30,285.27 × 6,339
  4. Step 4: Simplify right side
    20,190x = 191,978,326.53
  5. Step 5: Solve for x
    x = 191,978,326.53/20,190
  6. Step 6: Final answer
    x = 9,508.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.